﻿<p>The purpose of this select type is enabling th assignment of a set of <em>IfcPropertySet</em>'s using the relationship  <em>IfcRelDefinesByProperties</em> relationship in addition to a single <em>IfcPropertySet</em>.</p> 

<blockquote class="NOTE">
NOTE&nbsp; The sole purpose of this select type is to enable an upward compatible enhancement
of the objectified relationship <em>IfcRelDefinesByProperties</em> in order to assign multiple <em>IfcPropertySet</em>'s, <em>IfcElementQuantity</em>'s or other subtypes of <em>IfcPropertySetDefinition</em>
to objects using a single instance of <em>IfcRelDefinesByProperties</em>.
</blockquote>

<blockquote class="history">HISTORY&nbsp; New select type in IFC4.</blockquote>